.net Create Connection Class?
Mar 19, 2012I want to create a class in vb.net that make the connection to database.Also I need the way to use this class inside forms. I need a code example of both the class and the form call
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How To Create A Connection Between A Control And A Property In A Class
Sep 20, 2010Is there a (simple) way to connect a textbox, label etc. to a property in a class?I have a project with a complex series of dialogs to enter data into a list of a costum class describing an experiment with many parameters that are stored as properties (both simple variables such as strings and integers, but also more complex ones).I need both to be able to update the list of my experiment class, but also to go the other way to populate the dialogs from the class.It can of course be done outside the class and the dialogs in separate subroutines. This however, quicly becomes unmanagable and hard to maintain as the dialogs and experiment class is expanded with new elements.If there was a simple way to connect say a textbox or label in a dialog with the appropriate property holding the information it would make it much easier.
View 5 RepliesVS 2010 Create Workspace Where Can Drag And Drop Icons And Create Connection
Mar 3, 2012I Want to develop a software like Yed.i just don know where to start.how we can create a workspace where i can drag and drop icons and create connection etc etc.
View 6 RepliesCreate A Create A New Connection To Database And Produce A New Dataset For Form?
Apr 17, 2009I have produced an application which works with datasets but I now wish to provide the user the ability to add and admend records within the database.But i wish to do this in a seperate form.My current dataset instanciates classes onLoad.Should i try passing the Dataset to the new form class? although I have the problem where by when i pass the dataset to the form class using code below i get this problem:[code]Should i just create a create a new connection to the database and produce a new dataset for this form? or is there a better way to do this?
View 2 RepliesCreate A New Class That Inherits From The Base Form Class And Define A New() Method With Parameters?
Oct 1, 2008I've been creating short test apps repeatedly to try to understand some of the concepts in VB.NET.For the most part it has been illuminating.I read Bucky's .NET knowlegebase tutorial on passing objects as parameters to newly created forms. He shows how to create a new class that inherits from the base form class and define a New() method with parameters Extending the concept I thought about doing the same thing with a form that was created at design-time (In this case Form2).
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VS 2010 : Create A New Class And Have Each List Item Of That Class Such As 'btnID', 'btnText'?
Apr 27, 2011I want to read a number of items from a file and then associate each of those items with a new button at run-time, so that when the user clicks one of the buttons I can display some information about that item.Can I use a LIST to manage these buttons and items? Can I create a new class and have each list item of that class, such as 'btnID', 'btnText', etc... ?
View 2 Replies.Net ADO Connection Class
Apr 25, 2011I created a connection class that should return a datatables/datareaders etc to my webpages. I am worried that the connections won't be closed properly by using this class. Here is the class: [code]I am worried that once I go into production the connections won't be close properly and my site will fail. I am new to .net, is there anything wrong with the principal behind this class?
View 3 RepliesUse A Class For My Database Connection?
Sep 13, 2010I know I'm missing something really simple here, but I'm trying to create a class that I can use to access the database in my program as this is obviously used a lot throught out the program and on different forms. I've used classes for other purposes and never had a problem but for what ever reason I can't seem to get this one to work.[code]...
View 1 RepliesConnection In Class.vb For A Command Object?
Mar 28, 2012im making a class.vb which has a sql connection. The class.vb will be used by all forms/windows on the application. So whenever a form needs to access the database, it will call class.vb.
This is the code in class.vb:
Public Sub Openconn()
Dim myConnection As SqlConnection
Dim connstring As String = "Data Source=192.162;Initial Catalog=db1;User Id=sa;Password=1;"
[code]....
but it gives error: value of type sqlconnection cannot converted to array of Sqlconnection.I just want a method that's useful for opening the connection and that is also useful when asigning to a command object.
Make ODBC Connection Be In The Class?
Dec 12, 2011I tried to make my ODBC Connection within the class. here's my class code
Public Class Library
Public Function Seek(ByVal Connection As Odbc.OdbcConnection, ByVal TableName As String, ByVal Field As String, ByVal Index As Long)
[Code]....
Here's my error: Unable to cast object of type 'System.Int32' to type 'System.Data.DataSet'. I am using VBdotNet2005
SQL Server DB Connection Class Creation?
Jul 22, 2011Trying to begin rewriting a VB6 application using .NET (as a Windows Forms app.) to get some practical coding experience.First hurdle is the best way to connect from VB.NET to typically various stored procedures in a SQL Server DB... I'm of course struggling a little along the way as well w/the difference in syntax and so forth, too.Anyone out there have an example you can point me to as far as typical blocks of code you use in calling to establish connectivity to SQL Server databases, populate SQLDataAdapter objects, etc?My assumption is that I need to create a connection object class and have everything in there and just call various methods of that connection object class whenever I need to connect to the database, retrieve data from stored procedures to populate fields on various screens of my app., close the connection to the database, etc.
View 4 RepliesCreate Objects Of C# Class From Program Class In DNN?
Feb 23, 2011Can we create objects of a C# class from a VB.NET class and vice versa?
View 2 RepliesVS 2010 Class Create Another Instance Of The Class Itself?
Jun 11, 2012I want to create a class that will "search" for something. Basically I load up the "search item" when the class is created and inside the class is logic to do the "search". The result of this logic will be more "searches" that I want to start. How can I have the logic in the class create another instance of the class itself?
View 3 RepliesVS 2008 Object Data - Create A Class And Create A Instance Of CarData?
Nov 28, 2010I want to create a class is it where I can do...
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How do I do this? Do i create a class and create a instance of CarData? but how do I add Color and Year etc to it?
Closing A Database Connection Opened In Another Class?
Mar 30, 2010I've got a fairly large VB.NET (3.5) project that makes a lot of database calls. So I created a namespace/class just to handle those fuctions. The idea was that this single point of entry into the database would give more control over validating input from users.
So my class looks something like this. (I've chopped some code out for readability, it works just fine except for all the open connections.
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So I can close the data reader, but how do I reach back to that original database class and close the connection. If I close it in that original class it will bomb when I try to loop through the data reader the in calling class.I'm sure this is probably pretty obvious but I'm fried from the keyboard.
Designing A Database Connection Class In VS 2005?
Oct 27, 2010I am working on designing a SQL Server database connection class in VB.net 2005. The idea behind doing this will be so a developer can can call the class, pass it a stored procedure name along with the parameters, and get return values back (if any).
View 1 RepliesHow To Store And Retrieve Connection String From Class
Apr 7, 2011In my application I have many different forms each use 3 different database. And right now I am placing the connection string in each form but when it is need to change I have to change in every form. Now what I want to store all connection string in a vb class and call them in every form. So that if I need to change I can do in that class. I have stored my connection string in database so even I don't want to connect to database again and again. I have some idea in which maybe a public class is used and some how I will call it on other forms.
View 2 RepliesChange Connection String In Class Library Project?
Jun 30, 2011In my earlier project I was able to change the connection string during the app settings loaded event and it was successfully. When I try to do the same for a code library project, I am not getting the system.configuration.connectionstringsettings to work. Could you please tell if there is a work around for this, or else it is always better to write the sql code instead of depending on the adapters etc.
Additional information: Clients App is WPF with Vb. Database is SQL Server 2008 Code Lib would only be on server, slq connectiona and data retrieving and saving actions are stored in classes in code lib only. Code Lib would be used with WCF, wcf is used to share the classes only and classes have the data. WCF is hosted as a windows service on server used by NET.TCP
How To Call Mysql Connection From Class Or Module I Get 'connStr' Is Not Declared
Oct 13, 2009I am try to learn to use Mysql / MySql.Data.MySqlClientI did find sample how to connect to Mysql but I want to have it in Class or Module so I only call open database when I open the form
How can I fix this Name 'connStr' is not declared
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Create A Class That Will Allow To Create Windows Shortcut?
Sep 10, 2008I'm in the process of trying to create a class that will allow me to create windows shortcut; Im using the following PDF file that gives me the shortcut file structure.
Ive been able to successfully load a shortcut file and parse its Lnk File Structure but now Im on the Shell Item ID List structure but I cannot find the Structure of the ITEMIDLIST anywhere
Furthermore I know I could use the Windows script object, but this is a dependency Im trying to avoid if I can, hence writing my own Shortcut class.
Class Has Been Create By Main Class Only?
Feb 27, 2011I'm try to create a class has been create by main class only by protect sub New but how do I create it ?
Public MustInherit Class Rune
Protected MustOverride Function Create() As Rune
Public Shared Function Factory(Of T As Rune)() As T
'I can't use "T As {Rune, New}" because Sub New isn't Public
'Return (New T).Create
End Function
End Class
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Change Connection String From Class Library In Main Application At Runtime?
Jan 16, 2009You can change the connection string at run-time like this. You make the connection string setting available for writing as a separate property inside the MySettings class:
Partial Friend NotInheritable Class MySettings
Public WriteOnly Property RunTimeConnectionString()
Set(ByVal value)
[code]....
Then, in some place when the application is being initialized (before using any table adapters of typed datasets), write something like:
My.Settings.RunTimeConnectionString = My.Settings.ProductionConnectionString
Where ProductionConnectionString is a simple String setting. It is a User Scope setting so every user can change it (by assigning a value to it, similar to the code above) and save it by calling My.Settings.Save()This code works well for connection strings which were initially created in the main project and stored in it's settings (= app.config file).
The connection string in the app.config actually has a longer name: MyApp.MySettings.MyConnectionString.When you have a connection string stored in the app.config in a class library project, and reference that project in the main project, the app.config files will somehow be merged, so the class library has it's settings.The thing that don't know how to do, is change a setting from the class library at run-time. I could copy the connection string setting from the class library to the main project's app.config. I must keep the same name, which looks something like: MyClassLibrary.My.MySettings.MyConnectionString.Can the same principle I showed above be somehow applied to this second connection string?
Create A Connection To A Database?
Aug 5, 2009I wrote a small application in witch I create a connection to a database. I'm new to this, so I followed the steps in MSDN help. I first created a link to the database with the "Datasource" of the Visual Studio environement. Then, in the code, I create instances of the dataset in the datasource and use a tableAdapter to register my changes in the database.
Now I want to allow the user of the application to specify the path of the DB file he wants to use. How can I do so? Do I still can use the datasource in the VS environment? I don't know where to start.
Create A Program That Has A SSH Connection To A VPS?
Jun 23, 2011is there a way to create a program that has a SSH Connection to a VPS?
View 2 RepliesCreate A Sql Connection String ?
Aug 31, 2011How to Create a sql connection String in vb.net 2010? my DataBase Is Sql Express 2008
Name of Allah, Most Gracious, Most Merciful and He created the human
Create Connection To Database?
Apr 16, 2011im sure that there are plenty of people here that have the same problem as me, but i cant seem to find a forum that explains this to me. well basically i have a program i am creating to use as a phone list, but to save data to a database on a mapped hard drive. I want to give the user the option to set the path of the database just by typing it into a textbox. The database will be supplied with the program, with all appropriate tables, i just really would like to know how to set up a connection to a database using code, and to be able to display it into a datagrid veiw. I know this seems simple to you guys,and i am really sorry, i am just new at this.
and also if u could, could u describe to me how to make it search through the database for like certain names/numbers?
Create The Connection To Database?
Jul 1, 2009I have this code of sending sms but i dunno know how to make the connection for the below code to run my program.
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How To Create PPPOE Connection Using Vb6
Oct 29, 2008creating a PPPoE Connection using VB6 code. I found allot of stuff related to creating a dialer but nothing related to how to create a PPPoE Connection.If any one can provide me some code on how to create a connection
View 8 RepliesUse Program To Create USB Connection?
Jan 29, 2011Can we use serial port object to create usb connection? How can we use Visual Basic to create USB connection
View 9 RepliesCreate The Connection To The Database And Then The Binding?
Nov 14, 2009Okay i have been looking around for some tutorials on databinding by code but all the ones i find use vb's built in function to create the connection to the database and then the binding but i need to do it manually. I am totally new to databinding as in i only learned about it from a previouse thread and have been fiddling since.
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So im kind of going blind here, i dont know whats going wrong or if im even using the correct dim statment for the binding,